Le 13/06/2017 à 18:24, Douglas Bates a écrit :
On Tue, Jun 13, 2017 at 10:56 AM Binxiang Ni <binxian...@gmail.com <mailto:binxian...@gmail.com>> wrote:Hi, I am working on fixing sparse matrix conversion for RcppArmadillo. Now a problem comes up to me: what kind of sparse matrix is expected to pass from Armadillo to R? That is, what should the result of wrap() be? dgCMatrix(if logical, lgCMatrix or ngCMatrix) or their original type? What do you mean by "their original type"? It seems that the correspondence is Armadillo Matrix package sp_mat <=> dgCMatrix sp_cx_mat <=> zgCMatrix sp_imat <=> igCMatrix
I would also consider the format used in a package slam. It simply stores the indexes and non-zero values in a triplet (i,j,v). Serguei. _______________________________________________ Rcpp-devel mailing list Rcpp-devel@lists.r-forge.r-project.org https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
